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A 34 g ball with a radius of 28 mm rolls back and forth in a...

A 34 g ball with a radius of 28 mm rolls back and forth in a hemispherical bowl of radius 5.5 cm.

(a) What is the period of the oscillation if the ball is solid?

0.386 s Incorrect: Your answer is incorrect.

(b) What is the period of the oscillation if the ball is hollow? 0.4 s Incorrect: Your answer is incorrect.

(c) What is the percent difference between the two?

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